Web Reference: In-depth solution and explanation for LeetCode 705. Design HashSet in Python, Java, C++ and more. Intuitions, example walk through, and complexity analysis. Better than official and forum solutions. Implement MyHashSet class: * void add (key) Inserts the value key into the HashSet. * bool contains (key) Returns whether the value key exists in the HashSet or not. * void remove (key) Removes the value key in the HashSet. Design a HashSet without using any built-in hash table libraries. Implement `MyHashSet` class: - `void add (key)` Inserts the value `key` into the HashSet. - `bool contains (key)` Returns whether the value `key` exists in the HashSet or not. - `void remove (key)` Removes the value `key` in the HashSet.
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